360 Harbor Lane, Key Biscayne, FL 33149

New Listing
$9,950,000
Property Type: Residential Bedrooms: 6 Baths: 6 Square Footage: 5,156 Status: Active
Current Price: $9,950,000 List Date: 10/19/2026 Last Modified: 10/20/2026

Overview

Description

Discreetly set in the heart of Key Biscayne — one of Miami’s most coveted island communities — this elegant modern two-story residence offers 5,156 SF of total space on a lush 9,300 SF lot with 6 bedrooms, 5.5 bathrooms, and a private office, perfectly balancing refined design with the relaxed island lifestyle. A travertine staircase entry and wrap-around porch with modern glass railings set a sophisticated tone, leading inside to soaring ceilings, herringbone oak floors by Listone Giordano, floor-to-ceiling sliding doors, and Lutron lighting. The open-concept living, dining, and family areas flow seamlessly to the outdoors. The chef’s kitchen showcases a striking fluted marble island with curved-edge countertops, floor-to-ceiling cabinetry by Design It, and a full Wolf and Sub-Zero appliance suite. The primary suite features a private terrace, dual custom walk-in closets, a dry sauna, and a show-stopping bath with aquamarine quartzite sourced from ARCA, dual Waterworks vanities, and a frameless glass shower. Outside, a covered terrace with fluted wood-paneled ceiling, summer kitchen with built-in grill and pizza oven, and a heated saltwater pool with marble deck and Baja ledge create the ultimate island retreat. Professionally designed landscaping and enchanting exterior uplighting illuminate the lush gardens, creating picturesque views through the home’s expansive glass walls, particularly after sunset. Integrated sound and four AC units complete this exceptional offering.

Listing Details MLS# A12104430

General Property Information

Property Sub Type
Single Family Residence
Bedrooms Total
6
Bathrooms Total
6
Bathrooms Full
5
Bathrooms Half
Yes
Building Area Main
5156
Living Area Main
4341
Year Built
2025
Carport YN
Yes
Attached Carport YN
Yes
Carport Spaces
2
Covered Spaces
2
Lot Size Area
9300
Lot Size Acres
0.21
Lot Size Dimensions
9300
Senior Community YN
No
Outdoor Living Spaces YN
Yes
Stories Total
2
Direction Faces
Northeast
Pool Private YN
Yes
Furnished
Unfurnished

Property Features

Dining Area: Dining/Living Room; Formal Dining; Kitchen Dining Exterior Features: Built-in Barbecue; Lighting Flooring: Marble; Wood Parking Features: Driveway; Paver Block; Attached Carport; Carport Property Condition: Resale Appliances: Dishwasher; Disposal; Dryer; Electric Range; Microwave; Oven; Refrigerator; Washer; Water Purifier; Other Architectural Style: Contemporary Construction Materials: Block; Other Cooling: Central Air; Electric Heating: Central; Electric Interior Features: Built-in Features; Closet Cabinetry; Entrance Foyer; High Ceilings; Walk-In Closet(s); Other Levels: Two Listing Terms: Cash; Conventional Other Equipment: Other Pets Allowed YN: Yes Pool Features: Heated; In Ground Possession: Negotiable Restrictions: No Restrictions Roof: Flat; Tile Sewer: Public Sewer Special Information: Property Survey Available Sprinkler Description: Auto Sprinkler; City Sprinkler System Tax Information: City/County; Tax Reflects No Exemptions Unit Description: Studio View: Garden; Pool Water Source: Public Window Features: Blinds Showing Requirements: 24 Hour Notice Outdoor Living Spaces: Balcony; Deck Balcony Details: Balcony - Open Room Types: Den; Family Room; Laundry; Maid/In-Law Quarters; Other

Contract Information

Comp Sale YN
No
Original List Price
9950000
Occupant Type
Call Listing Agent

Location and Legal

Country
United States
County Or Parish
Miami-Dade
County Parish Name
Miami-Dade
Street Number
360
Street Name
Harbor
Street Suffix
Lane
City Name
Key Biscayne
Municipal Code
24
State Or Province
FL
Postal Code
33149
Postal Code +4
1712
Postal Zip
33149
Subdivision Name
BISCAYNE KEY ESTATES
Area
2520
Elementary School
Key Biscayne K-8
Middle Or Junior School
Ponce De Leon
High School
Coral Gables
Parcel Number
2452050011490
Subdivision Number
Yes
Zoning
0100
Flood Zone
AE

Financial Information

Membership Fee Required YN
No
Tax Annual Amount
31314
Tax Year
2025
Tax Legal Description
5 & 6 55 42 BISCAYNE KEY ESTS PB 50-61 LOT 3 BLK 10 LOT SIZE 8000 SQ FT OR 12488-3411 0485 4 COC 24947-2228 09 2006 5
Estimated Monthly Assoc Recurring Fee
0

Status Change Information

Major Change Timestamp
2026-10-19T04:00:00Z
Major Change Type
New Listing
Status Change Date
2026-10-19

More Information

Entry Information

Entry Level
Yes

Storm Protection

Impact Glass
Complete

Price Calculations

Current Price To SqFt
2292.09

Section Details

Parcel Number MLX
1490

Originating Details

Originating System Key
566501064
Originating System ID
M00000151

Office/Member Information

DXORIGMLSID
SEF

Amenities

None
Yes

Dining Area

Dining/Living Room
Yes
Formal Dining
Yes
Kitchen Dining
Yes

Exterior Features

Built-in Barbecue
Yes
Lighting
Yes

Flooring

Marble
Yes
Wood
Yes

Parking Features

Driveway
Yes
Paver Block
Yes
Attached Carport
Yes
Carport
Yes

Property Condition

Resale
Yes

Possession

Negotiable
Yes

Sewer

Public Sewer
Yes

Special Information

Property Survey Available
Yes

View

Garden
Yes
Pool
Yes

Heating

Central
Yes
Electric
Yes

Sprinkler Description

Auto Sprinkler
Yes
City Sprinkler System
Yes

Unit Description

Studio
Yes

Window Features

Blinds
Yes

Appliances

Dishwasher
Yes
Disposal
Yes
Dryer
Yes
Electric Range
Yes
Microwave
Yes
Oven
Yes
Refrigerator
Yes
Washer
Yes
Water Purifier
Yes
Other
Yes

Construction Materials

Block
Yes
Other
Yes

Interior Features

Built-in Features
Yes
Closet Cabinetry
Yes
Entrance Foyer
Yes
High Ceilings
Yes
Walk-In Closet(s)
Yes
Other
Yes

Levels

Two
Yes

Listing Terms

Cash
Yes
Conventional
Yes

Other Equipment

Other
Yes

Pool Features

Heated
Yes
In Ground
Yes

Roof

Flat
Yes
Tile
Yes

Water Source

Public
Yes

Architectural Style

Contemporary
Yes

Cooling

Central Air
Yes
Electric
Yes

Showing Requirements

24 Hour Notice
Yes

Master Bedroom/Bath

Dual Sinks
Yes
Master Bdrm - Ground
Yes
Master Bdrm - Sitting
Yes
Master Bdrm - Upstairs
Yes
Separate Shower
Yes

Pets Allowed YN

Yes
Yes

Pool Size Details

Pool Size (WxL)
No

Restrictions

No Restrictions
Yes

Tax Information

City/County
Yes
Tax Reflects No Exemptions
Yes

Outdoor Living Spaces

Balcony
Yes
Deck
Yes

Balcony Details

Balcony - Open
Yes

Room Types

Den
Yes
Family Room
Yes
Laundry
Yes
Maid/In-Law Quarters
Yes
Other
Yes

Room Information

Den Family Room Maid/In-Law Quarters Other Laundry
Listing Office: Coldwell Banker Realty
IDX
Source MLS Verified
Last Updated: October - 20 - 2026
This information is not verified for authenticity or accuracy and is not guaranteed and may not reflect all real estate activity in the market. Copyright 2026 Beaches Multiple Listing Service, Inc. All rights reserved. Information Not Guaranteed and Must Be Confirmed by End User. Site contains live data.

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